package com.itheima.consumer.controller;

import com.itheima.consumer.pojo.User;
import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
@RequestMapping("/consumer")
@Slf4j
@DefaultProperties(defaultFallback ="defaultFallback" )
public class ConsumerController {
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("{id}")
    //@HystrixCommand(fallbackMethod="queryByIdFallback")
    @HystrixCommand
    public String queryById(@PathVariable Long id ){
        String url="http://localhost:9091/user/"+id;
        if(id==1){
            throw new RuntimeException("太忙了");
        }
        //获取eureka中注册的user-service示例列表
        List<ServiceInstance> serviceInstanceList = discoveryClient.getInstances("user-service");
        ServiceInstance serviceInstance = serviceInstanceList.get(0);
        url="http://"+serviceInstance.getHost()+":"+serviceInstance.getPort()+
                "/user/"+id;
//       url="http://user-service/user/"+id;
        return restTemplate.getForObject(url,String.class);
    }

    public String queryByIdFallback(Long id){
        log.error("查找用户信息失败。id：{}",id);
        return "对不起，网络太拥挤了！";
    }
    public String defaultFallback(){
        return "默认提示：对不起，网络太拥挤了！";
    }
}
